Defense agreements between the United States of America and Greece Extending Agreement of July 8, 1990, effected by exchange of notes at Athens, April 16 and May 6, 2004; effected by exchange of notes at Athens, March 16 and May 5, 2005; effected by exchange of notes at Athens, April 25 and May 5, 2006; effected by exchange of notes at Athens, May 5 and 6, 2007; effected by exchange of notes at Athens, April 16 and May 6, 2008; effected by exchange of notes at Athens, August 6 and September 11, 2009.